Acetic Acid → Acetic acid, 1,1',1'',1'''-tetraanhydride with silicic acid (H4SiO4)

HRID 851515Notes

Reaction equation

HRID 851515 reaction equation
[Si](Cl)(Cl)(Cl)Cl.[C:6]([OH:9])(=[O:8])[CH3:7].[C:10]([O:13]CC)(=[O:12])[CH3:11].[SiH4:16]>C(O)C>[C:6]([O:9][Si:16]([O:13][C:10](=[O:12])[CH3:11])([O:9][C:6](=[O:8])[CH3:7])[O:8][C:6](=[O:9])[CH3:7])(=[O:8])[CH3:7]

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 8857Ethyl AcetateHCID 23953SilaneHCID 24816Silicon tetrachloride

Product 1

HCID 68419Acetic acid, 1,1',1'',1'''-tetraanhydride with silicic acid (H4SiO4)

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

Tetraacetoxysilane was prepared by the reaction of 125 g of silicon tetrachloride and 400 g of acetic acid as blended and stirred at room temperature. When the evolution of hydrogen chloride gas had ceased with precipitation of white crystalline tetraacetoxysilane, the unreacted acetic acid was removed by stripping under a reduced pressure and the residue was dissolved in 300 g of ethyl alcohol. The reaction between the tetraacetoxysilane and ethyl alcohol was carried out by heating the above reaction mixture at 60° C. with agitation for 10 hours. The formation of large amounts of ethyl acetate and hydroxy-containing silane compounds was detected in the resultant reaction mixture which had a solid content of 5.9% by weight upon dilution by adding 120 g of ethyl alcohol.

Workup

  1. customWhen the evolution of hydrogen chloride gas had ceased with precipitation of white crystalline tetraacetoxysilane
  2. customthe unreacted acetic acid was removed
  3. dissolutionthe residue was dissolved in 300 g of ethyl alcohol
  4. customThe reaction between the tetraacetoxysilane and ethyl alcohol
  5. temperatureby heating the above reaction mixture at 60° C. with agitation for 10 hours
  6. customreaction mixture which

Sources & evidence

ORD record
ord-a766d929d33a4c2f9154a896f1c785fc
Source dataset
uspto-grants-1983_05
Patent number
US04385086

Reaction notes

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